#### Topic: about the cumulative sum

I don't know this is a bug or just a different Cumulative sum?

when i tried to convert the Cumulative Sum (CuSum for short) from FSB To mt4

I found that there quite a lot different your version to what i found on the net http://forum.mql4.com/22956

the formula which is :

`IndicatorBuffer1[i]= IndicatorBuffer1[i+1]+Close[i]-average(i); `

but your is:

```
adCumulSum[iBar] =
adCumulSum[iBar - 1] - adBasePrice[iBar - iPeriod] + adBasePrice[iBar];
```

confused...